Zócalo and Templo Mayor

The second-largest public square in the world — the heart of both the Aztec empire and the Spanish colonial order — is surrounded by the National Palace with Diego Rivera's monumental history murals, the Metropolitan Cathedral built over the ruins of the Aztec sacred precinct, and the excavated Templo Mayor pyramid. Free entrance to the murals and the cathedral makes this the highest culture-per-peso experience in Mexico.